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The COMP Cams ID spring seat for GM LS1 applications is a hardened steel locator that centers and retains valve springs while protecting the head and shim under high RPM and heavy spring pressures. Specifically sized for LS1 use, the 4712 features a 1.400" outer diameter with a .520" inner diameter, giving a direct-fit hardened seat option where those dimensions are required.
COMP Cams Spring Seat For GM LS1 1.400in
